Two transit search experiments

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In the last chapter we have assembled wholesale of ingredients to understand how to analyze a transit. How to get to the physical content of the planet and the stars. And as well as to make sure that what we detecting is, indeed, a real transit and not something else. So what I would like to talk here is, to show you two experiment. There is much more than to experiment in transit but the idea is to take two very different, emblematic experiment that have a different concept and different buildup to understand how practically we can make this transit such real. So the first one I would like talk about is the SUPERWASP experiment. So it's a grande experiment, which is based [UNKNOWN] with a very simple idea. You take small telescopes. You put a lot of them. Each of these telescopes has a big field of view and then you observe a large fraction of the sky. So this experiment actually is a twin experiment. There is one such telescope very special as you see it, in the North Hemisphere in La Palma and another one which is in South Africa. So, this way, when you combine the telescopes, you can observe the whole sky. So, this is an experiment,which is called whole sky experiment. So it's a wide search for a transiting planet. That where comes the WASP name. So, technically speaking, this is a very small telescope. It's 11 centimeter telescope, so it's very tiny telescopes. But because of this tiny size, then you can observe a large field of view. It's 61 square degrees. It's very full of the field of view. To understand it and, this is a typical picture you have with SUPERWASP. To have the scale on the bottom you see how many moons. You need, you can get in the, in the field. So you have all the, you hold the, the moon in mind. If you don't have it, just have a look at the moon tonight, and figure out that you can have a square observe with SUPERWASP, which is a moon made of 60 moon. So 60 moon in each, in each side will be,will make one, camera of WASP. So there is eight of this and you can imagine how big of a fraction of the sky you can observe. Well the caveat to that is you cannot get very detailed picture. The each of the picture it's a little bit blind. It's what's called a 14 oxygon per pixel. So, in theory, if you build a good telescope these days, you get much smaller than one,one oxygon. So this is built not to be the best sharpest image possible. But this is built to get you access to the sky. So, as, if you remember the background situation I told you about. You have to be careful with your backgrounds. It means that the consequence, this experiment is only observing bright star. And, it's difficult to look for shallow transit. Because, and you have to be careful where to look at. Because if you look in the galaxy, there will be too much background stars, that will prevent the detections. You have to be a bit careful in the way you do that. You come to take shadow transit, but you address a first search, we'll sky search. So practically, the, the typical search area of WASP is the rural sky. So this is where we picture the sky, this is a kind of a globe, project globe of the sky. There's a north and a southern part. You see some black area, like a smile. This is the galaxy. This is exactly where you would sit in the galaxy when you look at the Milky Way. This is where you will have the Milky Way.